You make it sound like it's impossible to regulate these things at sea. That is simply not true and very much possible. For example, right now the highest allow

You make it sound like it's impossible to regulate these things at sea. That is simply not true and very much possible. For example, right now the highest allowable sulfur content for bunker fuels used outside of ECAs is 3.5%. Obviously this requirement will be tightened further in the future.